Geometry, Unit 2 Test Review
Compass
An instrument with two arms, one sharp and one with a pencil that can be used to draw circles or arcs.
Alternate Exterior angle theorem and converse
Angles that lie outside a pair of lines and on opposite sides of a transversal.
Supplementary
Two angles whose sum is 180 degrees
Complementary
Two angles whose sum is 90 degrees
Same-side Exterior Angle theorem and converse
Two exterior angles on the same side of the transversal.
Linear Angles
Two supplementary angles that are adjacent (next to each other)
Angle
A figure formed by two rays with a common endpoint
Transversal
A line that crosses at least two other lines.
Linear Pair
A pair of adjacent angles whose noncommon sides are opposite rays.
Vertical Angles
A pair of opposite congruent angles formed by intersecting lines
Flow proof
A type of proof that uses arrows to show the flow of a logical argument
Corresponding angle postulate and converse
If two parallel lines are cut by a transversal, then the pairs of corresponding angles are congruent
Arc
a portion of the circumference of a circle
Two-Column Proof
a proof that lists numbered statements on the left, and corresponding numbered reasons for justification on the right
Angle Bisector
a ray that divides an angle into two congruent angles
Alternate Interior Angle Theorem and converse
angles between 2 lines and on opposite sides of a transversal
Interior Angles
angles on the inside of parallel lines cut by a transversal
Exterior Angles
angles on the outside of parallel lines cut by a transversal
Angle Addition Postulate
the measure of the larger angle is the sum of the measures of the two smaller ones.
Same-side Interior Angle theorem and converse
two interior angles on the same side of the transversal
Construction
utilize only two tools - the straightedge (an unmarked ruler) and the compass